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B-LINE Dura-Blok Rooftop Support 5" x 6" x 20.2" 1000 lbs Cast Iron with Electro-Plated Finish
Heavy-Duty Rooftop Equipment Support Solution
The B-LINE Dura-Blok rooftop support delivers reliable structural support for rooftop equipment installations with its robust cast iron construction and 1000 lbs load capacity. This professional-grade support block features precise dimensions of 5" height, 6" length, and 20.2" width, providing stable mounting platform for HVAC units, electrical equipment, and other rooftop installations. The electro-plated finish ensures long-lasting corrosion resistance in outdoor environments.
Professional Features & Benefits
- 1000 lbs Load Capacity: Supports heavy rooftop equipment installations with confidence and structural integrity
- Cast Iron Construction: Provides exceptional durability and strength for long-term outdoor performance
- Electro-Plated Finish: Delivers superior corrosion resistance and extended service life in harsh weather conditions
- Precision Dimensions: 5" x 6" x 20.2" sizing ensures proper fit and optimal load distribution
- Professional Grade Design: Engineered for commercial and industrial rooftop applications requiring reliable support
- B-LINE Quality: Trusted brand reputation for structural support solutions in electrical and mechanical systems
Technical Specifications
- Certifications: Contact Manufacturer
- Department: Electrical
- Load Capacity: 1000 lbs
- Material: Cast iron
- Product Finish: Electro-plated
- Product Group: Fasteners
- Product Height: 5 in
- Product Length Depth: 6 in
- Product Subgroup: Washers / Nuts / Bolts / Screws
- Product Type: Channel Nut
- Product Weight: 10.63 lb
- Product Width: 20.2 in
Professional Applications
- Commercial HVAC Equipment Support
- Industrial Rooftop Installations
- Electrical Equipment Mounting
- Mechanical System Support
- Multi-Unit Building Applications
- Professional Construction Projects
- Maintenance and Retrofit Applications
Why Choose B-LINE Quality?
B-LINE delivers trusted structural support solutions with proven cast iron construction and electro-plated finish for reliable long-term performance. The precision-engineered Dura-Blok rooftop support provides professional-grade reliability for demanding commercial and industrial applications requiring dependable equipment mounting solutions.
Manufacturer Resources
Product Specs
- Certifications:
- Contact Manufacturer
- Load Capacity:
- 1000 lbs
- Product Height:
- 5 in
- Product Length Depth:
- 6 in
- Product Weight:
- 10.63 lb
- Product Width:
- 20.2 in
- Product Type:
- Channel Nut
- Department:
- Electrical
- Product Group:
- Fasteners
- Product Subgroup:
- Washers / Nuts / Bolts / Screws
- Product Finish:
- Electro-plated
- Product Material:
- Cast iron
B-LINE DB20 – Frequently Asked Questions
1) How much weight can a B-LINE Dura-Blok DB20 rooftop support hold?
The Dura-Blok DB20 block carries a 1000 lbs load capacity. That is the rating for the block itself, so on a run of pipe, duct or conduit you size the number of blocks and the spacing between them to keep each one under that figure rather than leaning on a single support. For heavier packaged equipment, add blocks along the run instead of concentrating the load on one point.
2) Do I have to penetrate the roof membrane to install a Dura-Blok DB20?
No penetration is involved. The DB20 is a free-standing block that sits on the roof surface and holds the load by its own mass and bearing area, which is why it is used on membrane and built-up roofs where drilling into the deck would void the roofing work. Its 5 inch height lifts the supported pipe or equipment clear of standing water and lets a roofer flash and re-cover underneath later.
3) Will a Dura-Blok DB20 hold up outdoors on an exposed roof?
Cast iron with an electro-plated finish is what the DB20 is built from, so it is made for continuous outdoor exposure on a roof deck rather than for interior mechanical rooms only. The plating is the corrosion barrier; keep it intact and avoid grinding or cutting the block on site.
4) How heavy is a single Dura-Blok DB20 to carry up to the roof?
Each DB20 weighs 10.63 lb, so one person can hand-carry two or three up a ladder or hoist a pallet of them without rigging. That matters when you are laying out a long conduit or refrigerant line run and need a dozen blocks placed by hand across a finished membrane.
How fast can I get the B-LINE DB20 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the B-LINE DB20 come with a warranty?
Absolutely. The B-LINE DB20 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the B-LINE DB20?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the B-LINE DB20 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.